CN211180433U - Low-crosstalk stereoscopic projection display device - Google Patents
Low-crosstalk stereoscopic projection display device Download PDFInfo
- Publication number
- CN211180433U CN211180433U CN202020071146.6U CN202020071146U CN211180433U CN 211180433 U CN211180433 U CN 211180433U CN 202020071146 U CN202020071146 U CN 202020071146U CN 211180433 U CN211180433 U CN 211180433U
- Authority
- CN
- China
- Prior art keywords
- horizontal
- light
- grating
- projection display
- cylindrical lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a low stereoscopic projection display device that disturbs. The low-crosstalk three-dimensional projection display device consists of a projector array, a cylindrical lens grating and a horizontal retro-reflection plate; the cylindrical lens grating and the horizontal back reflection plate are sequentially arranged in front and back; the projector array consists of a plurality of projectors in different horizontal positions, and the projectors can project parallax images to the positions of the cylindrical lens grating and the horizontal retro-reflection plate; the horizontal retroreflective sheet can retroreflect light in the horizontal direction and scatter light in the vertical direction; the lenticular lens is placed in front of the horizontal retroreflective sheet and reflects light, thereby reducing crosstalk.
Description
Technical Field
The utility model relates to a display technology, more specifically say, the utility model relates to a stereoscopic projection display technology.
Background
The projection display device can project an image onto a screen, which is advantageous in terms of picture size compared to a conventional flat panel display device. In addition, the projection display device can also be used for display of stereoscopic images. The common stereoscopic projection display device is composed of components such as a lenticular lens grating and a projector, provides parallax images through the projector, realizes stereoscopic image display by utilizing the light splitting effect of the lenticular lens, and requires precise coupling in the optical structure. The utility model provides a low stereoscopic projection display device that crosstalks, the retro reflection principle of its accessible realizes the stereoscopic image display to utilize the cylindrical lens grating to reduce and crosstalk.
SUMMERY OF THE UTILITY MODEL
The utility model provides a low stereoscopic projection display device that disturbs. Fig. 1 is a schematic structural diagram of the low crosstalk stereoscopic projection display device. The low-crosstalk three-dimensional projection display device is composed of a projector array, a cylindrical lens grating and a horizontal retro-reflection plate. The cylindrical lens grating and the horizontal retro-reflecting plate are sequentially arranged in front of and behind.
The projector array is composed of a plurality of projectors in different horizontal positions, and the projectors can project parallax images to the positions of the cylindrical lens grating and the horizontal retro-reflection plate.
The horizontal retroreflective sheet retroreflects light in the horizontal direction and scatters light in the vertical direction. Specifically, light incident on the horizontal retroreflective sheet may return in the horizontal direction and be scattered in various directions in the vertical direction.
The lenticular lens is placed in front of the horizontal retroreflective sheet and reflects light, thereby reducing crosstalk.
Further, referring to fig. 2, the light emitted from the projector passes through the lenticular lens to reach the horizontal retroreflective sheet. The light rays return in the horizontal direction according to the original direction due to the horizontal retro-reflection action, and then are converged to the horizontal coordinate position of the projector again through the cylindrical lens grating; scattering in the vertical direction to various directions. Therefore, when the human eyes are in any vertical projection direction which is the same as the horizontal position of a certain projector, the image projected by the projector can be seen. When the left eye and the right eye of a viewer are respectively positioned at the horizontal positions of different projectors, the corresponding parallax images can be respectively seen, so that stereoscopic vision is generated.
Further, referring to fig. 2, the horizontal retroreflective sheet generally has a reflective defect due to process reasons, and a small amount of reflected light rays will not be reflected in the original incident direction in the horizontal direction. These rays can be refracted by the cylindrical lens grating and then projected to the vicinity of the projector position again.
Optionally, the horizontal retroreflective sheet is comprised of a diffusion grating and a retroreflective film. The retroreflective film adopts a cubic crystal structure, and a periodic structure of the retroreflective film is formed by three square reflecting planes which are orthogonally arranged at ninety degrees and can reflect light rays along the original incident direction through three reflections. The scattering grating is used for scattering light in the vertical direction, and the scattering grating is used for scattering light by utilizing the displacement of incident light and emergent light on the retro-reflecting film.
Preferably, the lenticular pattern and the horizontal retroreflective sheet are spaced apart by a distance equal to the focal length of the lenticular pattern.
Alternatively, the cylindrical lenticular grating can be replaced with a slit grating and the crosstalk is reduced using the principle of occlusion.
In conclusion, because the utility model provides a cylindrical lens grating can reduce the level and reflect the crosstalking that the board produced because of the technology reason through the refraction effect, so its traditional structure that uses the level to reflect the board for simple has less crosstalking.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a light path diagram of the horizontal direction in the present invention.
Fig. 3 is a schematic view of the horizontal retroreflective sheet of the present invention.
Fig. 4 is a schematic view of the retroreflective film of the present invention.
Fig. 5 is a schematic view of the vertical scattering in the present invention.
Icon: 010-low crosstalk stereoscopic projection display devices; 100-horizontal retroreflective sheet; 200-cylindrical lenticulation; 300-a projector; 020-horizontal light path of the invention; 410-incident light; 420-reflected light; 430-light not reflected in the incident direction; 030-horizontal retroreflective sheeting; 110-a retroreflective film; 120-a scattering grating; 040-retroreflective film principle; 050-vertical scattering principle.
It should be understood that the above-described figures are merely schematic and are not drawn to scale.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Examples
Fig. 1 is a schematic structural diagram of a low crosstalk stereoscopic projection display device 010 provided in this embodiment. In the figure, the x-coordinate represents the horizontal direction in space, the y-coordinate represents the vertical direction in space, and z represents the direction perpendicular to the x-y plane.
Referring to fig. 1, the present embodiment provides a low crosstalk stereoscopic projection display device 010, where the low crosstalk stereoscopic projection display device 010 is composed of a projector array, a lenticular lens 200, and a horizontal retro-reflective plate 100. The lenticular lens 200 and the horizontal retroreflective sheet 100 are placed in this order.
The projector array is composed of a plurality of projectors 300 at different horizontal positions, and the projectors 300 can project parallax images to the positions of the cylindrical lenticulation 200 and the horizontal retro-reflection plate 100.
Referring to fig. 3, the horizontal retroreflective sheet 100 is composed of a diffusion grating 120 and a retroreflective film 110, and the horizontal retroreflective sheet 100 reflects light in the horizontal direction and diffuses light in the vertical direction. Light incident on the horizontal retroreflective sheet 100 may return in the original direction in the horizontal direction and be scattered in various directions in the vertical direction.
Referring to fig. 4, the retroreflective film 110 has a cubic structure with a periodic structure of three reflective square planes orthogonally disposed at ninety degrees, which can reflect light in the original incident direction by three reflections. Meanwhile, during the reflection process, the position of the reflected light ray 420 of the retro-reflective film and the position of the incident light ray 410 of the retro-reflective film generate a certain displacement.
Referring to fig. 5, the diffusion grating 120 is made of a cylindrical lenticular grating with a small pitch, which diffuses light in a vertical direction by using the displacement of incident light and emergent light on the retroreflective film. The reflected light 420 may be refracted by the diffusion grating 120 to other vertical propagation directions different from the incident light 410 when passing through the diffusion grating 120.
Referring to fig. 2, light emitted from the projector 300 passes through the lenticular lens 200 to reach the horizontal retroreflective sheet 100. The light rays return in the horizontal direction according to the original direction due to the horizontal retro-reflection action, pass through the cylindrical lens grating 200 again and converge to the horizontal coordinate position of the projector 300 again; scattering in the vertical direction to various directions. Therefore, when the human eyes are in any vertical projection direction which is the same as the horizontal position of a certain projector, the image projected by the projector can be seen. When the left eye and the right eye of a viewer are respectively positioned at the horizontal positions of different projectors, the corresponding parallax images can be respectively seen, so that stereoscopic vision is generated.
Referring to fig. 2, the lenticular lens 200 is placed in front of the horizontal retroreflective sheet 100, and the focal length of the lenticular lens 200 is equal to the distance between the lenticular lens 200 and the horizontal retroreflective sheet 100. Referring to fig. 2, the horizontal retroreflective sheet 100 generally has a reflection defect due to the process, and a small amount of reflected light will not be reflected in the original incident direction in the horizontal direction. The light 430 that is not reflected in the incident direction can be refracted by the lenticular lens 200 and then projected to the projector 300.
In summary, the lenticular lens 200 of the present invention can reduce the crosstalk generated by the horizontal retroreflective sheet 100 due to the process by refraction, so that the horizontal retroreflective sheet 100 has less crosstalk compared to the conventional structure using the horizontal retroreflective sheet 100 alone.
Claims (4)
1. A low crosstalk stereoscopic projection display apparatus, comprising: the low-crosstalk three-dimensional projection display device consists of a projector array, a cylindrical lens grating and a horizontal retro-reflection plate; the cylindrical lens grating and the horizontal back reflection plate are sequentially arranged in front and back; the projector array consists of a plurality of projectors in different horizontal positions, and the projectors can project parallax images to the positions of the cylindrical lens grating and the horizontal retro-reflection plate; the horizontal retroreflective sheet can retroreflect light in the horizontal direction and scatter light in the vertical direction; specifically, light incident on the horizontal retroreflective sheet can return in the original direction in the horizontal direction and be scattered in various directions in the vertical direction; the cylindrical lenticulation is arranged in front of the horizontal retro-reflecting plate and can reflect light.
2. The low crosstalk stereoscopic projection display apparatus of claim 1 wherein: the horizontal retroreflective sheet is composed of a scattering grating and a retroreflective film; the retroreflection film adopts a cubic crystal structure, the periodic structure of the retroreflection film is formed by three square reflection planes which are orthogonally arranged at ninety degrees, and light can be reflected along the original incident direction through three times of reflection; the scattering grating is used for scattering light in the vertical direction, and the scattering grating is used for scattering light by utilizing the displacement of incident light and emergent light on the retro-reflecting film.
3. The low crosstalk stereoscopic projection display apparatus of claim 1 wherein: the distance between the cylindrical lens grating and the horizontal retroreflective sheet is equal to the focal length of the cylindrical lens grating.
4. The low crosstalk stereoscopic projection display apparatus of claim 1 wherein: the cylindrical lens grating is replaced by a slit grating, and the crosstalk is reduced by utilizing the shielding principle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020071146.6U CN211180433U (en) | 2020-01-14 | 2020-01-14 | Low-crosstalk stereoscopic projection display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020071146.6U CN211180433U (en) | 2020-01-14 | 2020-01-14 | Low-crosstalk stereoscopic projection display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211180433U true CN211180433U (en) | 2020-08-04 |
Family
ID=71802032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020071146.6U Active CN211180433U (en) | 2020-01-14 | 2020-01-14 | Low-crosstalk stereoscopic projection display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211180433U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731681A (en) * | 2021-04-06 | 2021-04-30 | 成都工业学院 | Desktop three-dimensional display device |
-
2020
- 2020-01-14 CN CN202020071146.6U patent/CN211180433U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731681A (en) * | 2021-04-06 | 2021-04-30 | 成都工业学院 | Desktop three-dimensional display device |
| CN112731681B (en) * | 2021-04-06 | 2021-07-06 | 成都工业学院 | Desktop three-dimensional display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107306507B (en) | Display device | |
| US11340475B2 (en) | Display device for aerial image having retro-reflective part | |
| US11630250B2 (en) | System for use in imaging in air | |
| CN100495115C (en) | Display | |
| CN212569307U (en) | Retro-reflection three-dimensional display device based on directional light source | |
| CN102033318B (en) | Head-up display device | |
| JP5799535B2 (en) | System for generating aerial 3D image and method for generating aerial 3D image | |
| CN113917701B (en) | Projection light field stereoscopic display device | |
| CN110286495B (en) | Retroreflective stereoscopic display device based on light source array | |
| CN210323674U (en) | Stereo display device with adjustable optimal viewing distance | |
| CN110286496B (en) | Stereoscopic display device based on front directional light source | |
| JP2010224292A (en) | Display device | |
| CN110058420A (en) | A kind of reflex reflection stereo projection display apparatus | |
| CN110456549B (en) | Stereoscopic display device with adjustable optimal viewing distance | |
| CN110989190A (en) | Low-crosstalk stereoscopic projection display device | |
| CN109856808A (en) | Suspension display device | |
| CN210323609U (en) | Retro-reflection three-dimensional display device based on light source array | |
| CN211180433U (en) | Low-crosstalk stereoscopic projection display device | |
| CN112731681B (en) | Desktop three-dimensional display device | |
| CN210323610U (en) | Three-dimensional display device based on front directional light source | |
| CN116500803B (en) | Time division multiplexing stereoscopic display device | |
| CN112684610B (en) | Slit grating 3D display with high optical efficiency | |
| US20210208420A1 (en) | Cylindrical spatial image projection device using half mirror | |
| CN111694163A (en) | 2/3D compatible multi-visual-area stereoscopic display device | |
| CN110286516B (en) | Three-dimensional display device with variable slit pitch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |